When I click the export button I get this
and an empty file is created on the server with a name like phpxltmpKlRBee
Changing to export CSV instead of xls works OK
I suppose CSV is an acceptable alternative for now as it will import to Excel
Seems to be memort limitation of php.
Try increasing php.ini's memory_limit param.
Got same issue with PHP 7.0. Increasing memory_limit to 512M didn't help. But downgrading to PHP 5.6 resolved the issue, works even with memory_limit=90M. But I wouldn't downgrade only because of this problem, any ideas of possible cause?
Can you check php error log file for any error message, when using on php7 ?
This will give some direction about resolution. Blank page could be due to many reasons.
If the error message is not clear, email me grid code + test database sql file + error message.
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