Error message

• Deprecated function: Return type of crumbs_PluginSystem_PluginMethodIterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 4 of /data/sites/web/solfanetorg/subsites/archief.solfanet.org/sites/all/modules/crumbs/lib/PluginSystem/PluginMethodIterator.php).
• Deprecated function: Return type of crumbs_PluginSystem_PluginMethodIterator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 4 of /data/sites/web/solfanetorg/subsites/archief.solfanet.org/sites/all/modules/crumbs/lib/PluginSystem/PluginMethodIterator.php).
• Deprecated function: Return type of crumbs_PluginSystem_PluginMethodIterator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 4 of /data/sites/web/solfanetorg/subsites/archief.solfanet.org/sites/all/modules/crumbs/lib/PluginSystem/PluginMethodIterator.php).
• Deprecated function: Return type of crumbs_PluginSystem_PluginMethodIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 4 of /data/sites/web/solfanetorg/subsites/archief.solfanet.org/sites/all/modules/crumbs/lib/PluginSystem/PluginMethodIterator.php).
• Deprecated function: Return type of crumbs_PluginSystem_PluginMethodIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in require_once() (line 4 of /data/sites/web/solfanetorg/subsites/archief.solfanet.org/sites/all/modules/crumbs/lib/PluginSystem/PluginMethodIterator.php).