Gravtiy Forms export doesn’t work

Hi,
We use Gravity Forms together with WP Stateless. When I try to export entries in Gravity Forms, I get an empty file. I was informed by Gravity Forms support that excluding the directory wp-content/gravity_forms/export/ from WP Stateless would be a possible solution to the problem.
Is there a way I can configure WP Stateless to do that? Or a different solution for the problem?

Additional Information:
– The compatibility mode of WP Stateless for Gravity Forms doesn’t help for this particular issue
– When I deactivate WP Stateless, exports work (but I can’t do that on a live site of course)

thanks!