Problem after update to 26.5

How to deal with this?

Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 5385

Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 5385

Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 5385

Deprecated: Return type of Requests_Cookie_Jar::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Cookie/Jar.php on line 63 Deprecated: Return type of Requests_Cookie_Jar::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Cookie/Jar.php on line 73

Deprecated: Return type of Requests_Cookie_Jar::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Cookie/Jar.php on line 89

Deprecated: Return type of Requests_Cookie_Jar::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Cookie/Jar.php on line 102

Deprecated: Return type of Requests_Cookie_Jar::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Cookie/Jar.php on line 111 Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::offsetExists($key) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 40

Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::offsetGet($key) should either be compatible with ArrayAccess::offsetGet(mixed $offset): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 51

Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::offsetSet($key, $value) should either be compatible with ArrayAccess::offsetSet(mixed $offset, mixed $value): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 68 Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::offsetUnset($key) should either be compatible with ArrayAccess::offsetUnset(mixed $offset): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 82 Deprecated: Return type of Requests_Utility_CaseInsensitiveDictionary::getIterator() should either be compatible with IteratorAggregate::getIterator(): Traversable, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /home/.sites/994/site7479539/web/wp-includes/Requests/Utility/CaseInsensitiveDictionary.php on line 91

Deprecated: preg_match(): Passing null to parameter #2 ($subject) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 1595

Deprecated: strip_tags(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2246 null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Deprecated: rtrim(): Passing null to parameter #1 ($string) of type string is deprecated in /home/.sites/994/site7479539/web/wp-includes/formatting.php on line 2772

Notice: ob_end_flush(): Failed to send buffer of zlib output compression (1) in /home/.sites/994/site7479539/web/wp-includes/functions.php on line 5275 Notice: ob_end_flush(): Failed to send buffer of zlib output compression (1) in /home/.sites/994/site7479539/web/wp-includes/functions.php on line 5275