can't access lot in gameplay mode

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.70.84.1020
What expansions, game packs, and stuff packs do you have installed? All except Moschino, Luxury and Fitness accessories
Steps: How can we find the bug ourselves? I don't know what to write in here.
What happens when the bug occurs? When I start the game, everything seems fine, I see the world maps. When I want to access one of my lots in gameplay mode, I can't get over the loadscreen. Other lots work fine. With that one lot, I can enter it from the maps to build mode, but not the gameplay mode. I have to exit the whole game and get a last exception which doesn't give the answer to said problem. I also put out all my mods and cc, everything, and it still happens. I can put the lastexception message in here if needed.
What do you expect to see? I want to have access to my main sims lot in gameplay mode.
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? No

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lastexception:

translated in xml pretty print online:

<?xml version="1.0"?>
<root>
  <report>
    <version>2</version>
    <sessionid>684bbc6da0012512602fa372</sessionid>
    <type>desync</type>
    <sku>ea.maxis.sims4_64.15.pc</sku>
    <createtime>2021-02-19 12:41:45</createtime>
    <buildsignature>Local.Unknown.Unknown.1.70.84.1020-1.200.000.485.Release</buildsignature>
    <categoryid>situation_sim.py:70</categoryid>
    <desyncid>684bbc6da0012512602fa372</desyncid>
    <systemconfig/>
    <screenshot/>
    <desyncdata>Exception raised while processing zone spin up sequence: isinstance() arg 2 must be a type or tuple of types (TypeError: isinstance() arg 2 must be a type or tuple of types)&#xD;
Traceback (most recent call last):&#xD;
&#xD;
  File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 179, in wrapper&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 209, in c_api_server_tick&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 470, in update&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1511, in update&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1165, in on_update&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\situations\situation_manager.py", line 1249, in on_hit_their_marks_during_zone_spin_up&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\situations\base_situation.py", line 374, in on_hit_their_marks&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\situations\base_situation.py", line 1915, in get_current_role_state_instance_for_sim&#xD;
  File "T:\InGame\Gameplay\Scripts\Server\situations\situation_sim.py", line 70, in current_role_state_instance&#xD;
TypeError: isinstance() arg 2 must be a type or tuple of typesrtim=0&#xD;
Client Session Time: 22.36&#xD; 
Num Save Errors: 0&#xD; 
Num Load Errors: 0&#xD; 
Current Game State: 0x96d01090&#xD; 
Origin Version: 10,5,92,46430&#xD; 
Modded: False&#xD; 
SystemInfo: Windows 10 10.0.19041 GPU: NVIDIA GeForce GTX 1650 nvldumdx.dll 27.21.14.5167, GUID: D7B71E3E-5CD1-11CF-3560-201A1BC2D635&#xD; 
</desyncdata>
  </report>
</root>

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