Since upgrade to 3.80, can't see leads etc.

[elir]

The error in the logs is:

Espo.WARNING: E_WARNING: Illegal offset type in isset or empty {"file":"/home/elir/public_html/newcrm/application/Espo/ORM/DB/Query/Base.php","line":339} [] any idea how to solve it?

[yuri]

Try turn off warnings or

fix manually according this commits:

https://github.com/espocrm/espocrm/commit/67857ef93cd33148b08eaa34574ad2cd73fe4291

https://github.com/espocrm/espocrm/commit/f93cc5b47200b1c0bc7980dde27505e4e5232083

https://github.com/espocrm/espocrm/commit/1383a5d5dab01d97cfaed5bea0758c59daa8ea0b

But i'm not sure that your problem is cased by warnings.