Same here! After click on “Save” button the console shows this error:
Uncaught TypeError: Cannot read property 'replace' of undefined
at Function.v.template (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:10)
at load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:14
at n.render (backbone-modal.min.js:1)
at n.initialize (backbone-modal.min.js:1)
at n.h.View (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:12)
at new n (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:12)
at Object.success (facebook-for-woocommerce-settings-sync.min.js:1)
at c (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:2)
at Object.fireWith [as resolveWith] (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:2)
at l (load-scripts.php?c=0&load[chunk_0]=jquery-core,jquery-migrate,utils,underscore,backbone,wp-util,moxiejs,plupload&ver=5.7:2)