After copy/paste of a procedure template (using ctrl-C / ctrl-V) my central block area went pale. I restarted the session in another browser: still no color. Restarted my PC and logged in again: still the same. What happened? Browser: Chrome 88.0.4324.150 (64 bit). Other than that everything appears to be working normally.
it helps you to check errors if you don't know which block cause the error. you can disable the block one by one. if block is disabled then, that block will not run.