Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\ColumnIterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\ColumnIterator.php on line 135
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\ColumnIterator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\ColumnIterator.php on line 153
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\ColumnIterator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\ColumnIterator.php on line 145
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\ColumnIterator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\ColumnIterator.php on line 171
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\ColumnIterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\ColumnIterator.php on line 125
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\Iterator::current() should either be compatible with Iterator::current(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\Iterator.php on line 55
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\Iterator::next() should either be compatible with Iterator::next(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\Iterator.php on line 73
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\Iterator::key() should either be compatible with Iterator::key(): mixed, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\Iterator.php on line 65
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\Iterator::valid() should either be compatible with Iterator::valid(): bool, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\Iterator.php on line 83
Deprecated: Return type of PhpOffice\PhpSpreadsheet\Worksheet\Iterator::rewind() should either be compatible with Iterator::rewind(): void, or the #[\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in C:\inetpub\wwwroot\dev_iscoms\ordful\Classes\PHPExcel\vendor\phpoffice\phpspreadsheet\src\PhpSpreadsheet\Worksheet\Iterator.php on line 45
Recently, I updated my PHP version to 8.3, and I'm encountering errors. I'm using an IIS server.