Unnecesary "Calendars +" option on public calendar page

[pboguslawski]

Steps to reproduce

1. Share calendar with link.
2. Open this link in browser.
3. See Calendar + option on sidebar:

Expected behavior

No Calendars + option on public calendar page.

Actual behavior

Calendar + option is displayed on public calendar page which is R/O. An error An error occurred, unable to create the calendar. is thrown if one tries to create new calendar using this unnecessary option.

Calendar app version

5.0.9 (693b2db)

CalDAV-clients used

No response

Browser

No response

Client operating system

No response

Server operating system

No response

Web server

None

Database engine version

None

PHP engine version

None

Nextcloud version

No response

Updated from an older installed version or fresh install

None

List of activated apps

Nextcloud configuration

Web server error log

Log file

Browser log

Additional info

No response

[SebastianKrupinski]

Confirmed on dev 31.

Shared calendar with a link, then use the link in another browser.