Help Fatal error with My Music Band Pro

When I do an update of my plugins or go to the new version of My Musac Band Pro I can't do anything anymore on my website and have this message : <b>Fatal error</b>: Uncaught Error: Attempt to modify property "response" on bool in /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-content/themes/my-music-band-pro/inc/updater/theme-updater-class.php:134 Stack trace: #0 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-includes/class-wp-hook.php(309): EDD_Theme_Updater->theme_update_transient(false) #1 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-includes/plugin.php(191): WP_Hook->apply_filters(false, Array) #2 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-includes/option.php(1960): apply_filters('site_transient_...', false, 'update_themes') #3 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-includes/update.php(787): get_site_transient('update_themes') #4 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-admin/menu.php(33): wp_get_update_data() #5 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-admin/admin.php(158): require('/home/clients/f...') #6 /home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-admin/update-core.php(10): require_once('/home/clients/f...') #7 {main} thrown in <b>/home/clients/f6ac2f745773e8715fcccd334042ab9c/web/wp-content/themes/my-music-band-pro/inc/updater/theme-updater-class.php</b> on line <b>134</b> <div class="wp-die-message"> Une erreur critique est survenue sur ce site. Veuillez consulter la boite de réception de l’e-mail d’administration de votre site pour plus d’informations. En apprendre plus sur le débogage de WordPress. </div>   Do you know how to fix this ? Help Regards Guillaume