Below you can find the correct settings in case you have problems or the app crashes in some rare cases.
Go to these settings by:
General Settings>Restrictions (if disabled, these settings are ok, if the are enabled check the following):
Generalsettings>Restrictions>Calendars: make sure to allow changes and Project App is green!
Generalsettings>Restrictions>Contacts: make sure to allow changes and Project App is green!
General settings>Restrictions>Reminders: make sure to allow changes and Project App is green!
Contact us at: firstname.lastname@example.org if you have any problems and have checked these settings! If this made it work for you, enjoy The Project App!
Thank you, The Project App Team