The English language "TICKET_*" notices for the recent feature Catalog Concerns all spell "Thank you" without a space between the two words as "Thankyou". I searched for "thankyou" in the code base and see the misspelling here in a db revision: https://github.com/Koha-Community/Koha/blob/b54da05c73c9ea5b04d3552b34fcc636b0a71851/installer/data/mysql/db_revs/221200010.pl#L97
Hi, this was already fixed in bug 33759, but you will have to fix if you installed before that.
... fix your notices ...
*** This bug has been marked as a duplicate of bug 33759 ***
Thinking about it... we could also fix the database updates for people updating. - The original fix only fixed the templates installed for new installations. Reopening.