If Crisp Chat has been configured, then unconfigured because it is no longer in use, a javascript error constantly appears on all pages:
ReferenceError: $crisp is not defined
at <anonymous>:1:1
at gtm.js?id=GTM-WZ....:500:414
at b (gtm.js?id=GTM-WZ....:501:329)
at We (gtm.js?id=GTM-WZ....:100:261)
at e (gtm.js?id=GTM-WZ....:325:266)
at gtm.js?id=GTM-WZ....:56:130
at Array.<anonymous> (gtm.js?id=GTM-WZ....:326:386)
at Object.execute (gtm.js?id=GTM-WZ....:326:142)
at fu (gtm.js?id=GTM-WZ....:327:986)
at ou (gtm.js?id=GTM-WZ....:331:43)
Probably related to Google Tag Manager considering the errors