Getting the following warning and error when loading existing game and a new game.   Custom faction that starts as a democracy.   (only error in the Diagnostics file)

<div class="Warning Default"><span class="time">16:36:02:339</span><span class="flags">Default</span><a onclick="toggle_stack('trace1395')">STACK</a>--> Invalid modifier: source property DemocracyLawsCostBonus does not exists on Empire#0. Descriptor:GovernmentDemocracy, Source:Senate
<pre id="trace1395">
 at Unsafe_UpdatePropertyDependency in :line 0
 at UpdatePropertyDependence in :line 0
 at Unsafe_ApplyModifierProvider in :line 0
 at PathNavigator_Found in :line 0
 at Found in :line 0
 at Traverse in :line 0
 at Traverse in :line 0
 at Traverse in :line 0
 at Traverse in :line 0
 at Unsafe_AddModifiersFrom in :line 0
 at Unsafe_AddDescriptor in :line 0
 at AddDescriptor in :line 0
 at AddDescriptor in :line 0
 at BindSimulation in :line 0
 at SetGovernment in :line 0
 at ExecuteCommand_SetGovernment in :line 0
 at ServerExecuteFactionTraitCommand in :line 0
 at MoveNext in :line 0
 at Run in :line 0
 at MoveNext in :line 0
 at InvokeMoveNext in :line 0
</pre>
</div>

<div class="Error Gameplay"><span class="time">16:36:02:339</span><span class="flags">Gameplay</span><a onclick="toggle_stack('trace1396')">STACK</a>An exception was raised when executing GameServerState_LaunchGame.
<pre id="trace1396">
 at GameService_CreateGameComplete in :line 0
 at OnCreateGameComplete in :line 0
 at CreateGameAsync_CoroutineExceptionHandler in :line 0
 at Run in :line 0
 at MoveNext in :line 0
 at InvokeMoveNext in :line 0
</pre>
</div>

<div class="Exception Gameplay"><span class="time">16:36:02:341</span><span class="flags">Gameplay</span><a onclick="toggle_stack('trace1397')">STACK</a>Array index is out of range.
<pre id="trace1397">
 at <checkDependancies>m__5 in :line 0
 at ForEachPropertyOperand in :line 0
 at Unsafe_ApplyModifierProvider in :line 0
 at PathNavigator_Found in :line 0
 at Found in :line 0
 at Traverse in :line 0
 at Traverse in :line 0
 at Traverse in :line 0
 at Traverse in :line 0
 at Unsafe_AddModifiersFrom in :line 0
 at Unsafe_AddDescriptor in :line 0
 at AddDescriptor in :line 0
 at AddDescriptor in :line 0
 at BindSimulation in :line 0
 at SetGovernment in :line 0
 at ExecuteCommand_SetGovernment in :line 0
 at ServerExecuteFactionTraitCommand in :line 0
 at MoveNext in :line 0
 at Run in :line 0
</pre>
</div>

<div class="Log Gameplay"><span class="time">16:36:02:341</span><span class="flags">Gameplay</span><a onclick="toggle_stack('trace1398')">STACK</a>Releasing game
<pre id="trace1398">
 at ReleaseGame in :line 0
 at CreateGameAsync_CoroutineExceptionHandler in :line 0
 at Run in :line 0
 at MoveNext in :line 0
 at InvokeMoveNext in :line 0
</pre>
</div>

there is a seperate part of the forum to report bugs to so please try to move your post, and good luck with getting your save file working again.