Is this error because of the mod? or no? 
I'm sorry, but an uncaught exception occurred.
While running game code:
  File "game/ch04.rpy", line 187, in script call
    "You wanted to do some work but the internet is out again."
  File "game/phonebook.rpy", line 26, in script call
    "You put your phone away."
  File "game/ch04.rpy", line 187, in script call
    "You wanted to do some work but the internet is out again."
  File "game/phonebook.rpy", line 26, in script call
    "You put your phone away."
ScriptError: could not find label 'calendar'.
-- Full Traceback ------------------------------------------------------------
Full traceback:
  File "renpy/bootstrap.py", line 331, in bootstrap
    renpy.main.main()
  File "renpy/main.py", line 652, in main
    run(restart)
  File "renpy/main.py", line 148, in run
    renpy.execution.run_context(True)
  File "renpy/execution.py", line 922, in run_context
    context.run()
  File "game/ch04.rpy", line 187, in script call
    "You wanted to do some work but the internet is out again."
  File "game/phonebook.rpy", line 26, in script call
    "You put your phone away."
  File "game/ch04.rpy", line 187, in script call
    "You wanted to do some work but the internet is out again."
  File "game/phonebook.rpy", line 26, in script call
    "You put your phone away."
  File "renpy/script.py", line 918, in lookup
    raise ScriptError("could not find label '%s'." % str(original))
ScriptError: could not find label 'calendar'.
Windows-10-10.0.19041
Ren'Py 7.4.10.2178
The Roommate 0.7.1
Wed Sep 21 00:10:12 2022