'unterminated json string' error on clientside_callback for dash >= 2.15

My code has clientside_callbacks that work fine up until dash 2.14. When I upgrade to 2.15 or above a number of callbacks stop working and I get the error message ‘unterminated json string’

What happened in the transition from 2.14 to 2.15 that can explain this error?

Hello @dnordfors,

Without seeing your code it is hard to determine the issue.

Please create an MRE that can demonstrate this issue. :grin: