Server crashes with this error message (Feb. 16th, 2019)

[00:00:50]: [string "../mods/workshop-381565292/scripts/waiter_k..."]:207: attempt to compare number with string
LUA ERROR stack traceback:
        ../mods/workshop-381565292/scripts/waiter_kitchen.lua(207,1) in function 'dlcingredientpostinit'
        ../mods/workshop-381565292/scripts/waiter_kitchen.lua(327,1) in function 'result'
        scripts/mods.lua(312,1) in function 'modimport'
        ../mods/workshop-381565292/modmain.lua(1,1) in main chunk
        =[C] in function 'xpcall'
        scripts/util.lua(711,1) in function 'RunInEnvironment'
        scripts/mods.lua(513,1) in function 'InitializeModMain'
        scripts/mods.lua(487,1) in function 'LoadMods'
        scripts/main.lua(302,1) in function 'ModSafeStartup'
        scripts/main.lua(375,1) in function 'callback'
        scripts/modindex.lua(64,1) in function 'BeginStartupSequence'
        scripts/main.lua(374,1) in function 'callback'
        scripts/modindex.lua(545,1)
        =[C] in function 'GetPersistentString'
        scripts/modindex.lua(519,1) in function 'Load'
        scripts/main.lua(373,1) in main chunk
[00:00:50]: [string "scripts/mainfunctions.lua"]:1079: variable 'global_error_widget' is not declared
LUA ERROR stack traceback:
        =[C] in function 'error'
        scripts/strict.lua(23,1)
        scripts/mainfunctions.lua(1079,1)
        =[C] in function 'GetPersistentString'
        scripts/modindex.lua(519,1) in function 'Load'
        scripts/main.lua(373,1) in main chunk
[00:00:50]: DoLuaFile Error: (null)
[00:00:50]: LuaError but no error string
[00:00:50]: Error loading main.lua
[...]
[00:00:51]: Shutting down