Ok this problem is also happening on all of our sites and is actually something that needs to be corrected in BPS Pro. Something must have changed recently on the WordPress API server on wordpress.org. I have created a working fix for this in BPS Pro code. I will need to release another BPS Pro version ASAP. BPS Pro 11.7.1 will be released in approximately 30 minutes from now and will have the new working fix for this problem.
BPS Pro 11.7.1 has been released @ 11:15am PST. If you do not see the BPS Pro upgrade notification on the WP Plugins page then use/click the BPS Pro Manual Upgrade Check link under the BPS Pro plugin description to force a BPS Pro upgrade check.
Additional Note: The BPS Pro error message has been changed from: “API Server Call failed” to: “BPS Pro: API Server Call failed” for better clarity/error sourcing.