i get this error when delete object in nested in nestedset in laravel
"Declaration of Kalnoy\Nestedset\BaseRelation::getRelationCountHash() should be compatible with Illuminate\Database\Eloquent\Relations\Relation::getRelationCountHash($incrementJoinCount = true)
Not compatible to Laravel v8.17.0 https://github.com/lazychaser/laravel-nestedset/issues/479
Fork with fix https://github.com/lazychaser/laravel-nestedset/pull/478#issuecomment-737104992
2022 Update
You can fix this by upgrading to kalnoy/nestedset v6.0.0 now.
this solves the problem
composer.json
"require": {
.
.
"kalnoy/nestedset": "^6.0.0",
.
.
}