The first fix has already been released on Steam:

#1 Hotfix released!
29. Mai um 16:13 Uhr - Aerosoft

Changelog:
- fixed broken questgiver queuing behavior
- fixed issue with main menu being broken when fmod failed to initialize (soundcard related issue)
- fixed bug with scenario initial savegames not working on some systems
- fixed missing or misassigned icons and assets (objects, events)
- added tooltips for patients looking for stations (thought bubbles)
- fixed "RequireBedRoom" build error
- added missing animations for the shooting range
https://steamcommunity.com/games/809720/announcements/detail/1616142961152889757

I'm curious when GOG gets the hotfix, or from GOG only the big updates with version number will be published.

Translated with Google

Rescue HQ - The Tycoon | #1 Patch
6. Juni um 14:19 Uhr - Aerosoft

Patchnotes:
- added "Sandbox Berlin" scenario
- fixed vehicles not returning from some emergencies and at end of scenarios
- added reputation gain to investigation board (tooltip already stated it but it didn't happen)
- vehicles now have a limit for how many and which kinds of visitors they can carry (patients, prisoners)
- fixed the trauma station alignment and access
- performance optimization that increase FPS rates
- fixed shooting range animations, no longer rotates on use
- fixed assets not being loaded properly from mods downloaded from the steam workshop - existing asset-mods will need to be reuploaded.
- fixed bug with outlines - they also now properly distinguish between "hovered" and "selected" object outline styles
- camera movement bounds update according to level bounds
- chinese: tutorial texts are no longer slightly cut off at top end


Your Rescue HQ - The Tycoon team

https://steamcommunity.com/games/809720/announcements/detail/1613891797101438143

And on GOG?


Changelog for Update 1.03 hotfix (7. Aug. um 10:32 Uhr - Fabian Boulegue [Aerosoft]):

Major Changes:

- @Someone's SFPD vehicles are now part of the mainmod, replacing the original SF Police vehicles. Thanks @Someone
- Funding replacement of SFPD vehicles from old savegames
- Needs rebalance: Adjusted intervals & range variety to a higher spread, which makes situations like ALL THE CREW NEEDS TO PEE AT THE SAME TIME much less likely.
- Mirror is now unlocked in SF :wink:

Dispatch Window:
- Traits on actors now have a highlight if they synergize with an active emergency Tag
- Changed equipment selection UI. Added a button to send out all available of a single type.
- Added descriptions to all tooltips in "Required Assets" section (i.e. traits now describe what they do) Actor Inspection
- Added needs display for actors
- Actor now shows department (if it exists)

Minor Changes & QoL
- Vehicle Maintenance is enabled by default and does not turn off automatically
- Jail Cell Bench is enabled by default and does not turn off automatically
- Added mod compilation error messages
- Additional ita loca improvements
- several minor UI & layout updates

Squashed Bugs:
- FIX dispatch map overlaying window
- FIX font breaking with certain characters
- FIX success rate tooltip being active from beginning
- FIX storage items were sent out when 0 are assigned in dispatch
- FIX items were created when 0 are assigned in dispatch

Rescue HQ - The Tycoon | #5 Update
Mi., 4. September 2019

Update time again! :steamhappy:
- Updated HUD to be cleaner. Now highlights Performance Rating and shows weekly spending.
- Updated Financial report UI and prediction algorithms for clearer visualization of weekly income and spending.
- Fixed a nasty bug which lead to wages not being payed at End of Week.
- Updated Shift Settings UI (at End of Week) to show filter and worker state more clearly.
- Fixed some bugs, including not being able to change hotkeys because the popup did not show up.
https://steamcommunity.com/games/809720/announcements/detail/1608270539793323476

Winter is Here! New beta branch update
Di., 17. September 2019

Changelog:
- Added two new Scenarios: Chicago in Winter (Medium & Hard)
- Updated US Medical vehicles (visuals)

Added 6 new character traits:
- PoliceBiochemical (Seasoned Police) +1 police on Biochemical emergencies
- PoliceStreetCop (Seasoned Police) +1 policestreet on Urban emergencies
- MedicIndustrial (Seasoned Medic) +1 medic on Industrial emergencies
- MedicHouseDoctor (Seasoned Medic) +1 medic on Urban emergencies
- MedicBiochemical (Seasoned Medic) +1 medic on Biochemical emergencies
- FireFighterChemical (Seasoned Firefighter) +1 firefighter on Chemical emergencies

And last, but not least, the feature everyone has been waiting for:
- Vehicles now Drive away along the street.
https://steamcommunity.com/games/809720/announcements/detail/2978491455753635260

Winter is here update out now!
Mi., 9. Oktober 2019

Changelog:
Added two new Scenarios: Chicago in Winter (Medium & Hard) Updated US Medical vehicles (visuals)

Added 6 new character traits:
- PoliceBiochemical (Seasoned Police) +1 police on Biochemical emergencies
- PoliceStreetCop (Seasoned Police) +1 policestreet on Urban emergencies
- MedicIndustrial (Seasoned Medic) +1 medic on Industrial emergencies
- MedicHouseDoctor (Seasoned Medic) +1 medic on Urban emergencies
- MedicBiochemical (Seasoned Medic) +1 medic on Biochemical emergencies
- FireFighterChemical (Seasoned Firefighter) +1 firefighter on Chemical emergencies

And last, but not least, the feature everyone has been waiting for:
- Vehicles now drive away along the street
- Language names are now in their respective language (not translated lol) - adjusted water area for emergencies
- Adjusted level 3 emergency chances for chicago contagion
- Several minor bugfixes regarding icons and scenario text
- Standard Ambulance has a new mesh for US
- Fixed subPump station missing preview mesh
- Added the icons for new actor traits in chicago scenarios
- Police now show up for day shift in chicago
- Buildable and purchasable ground in chicago now properly show snow / cleared state

https://steamcommunity.com/games/809720/announcements/detail/1603770112079724527

Don`t buy this Game here, its not the newest version on GOG.