Admin error after update to v 1.4.7.1

Hi, I use duplicator on all my WP sites and have never had a problem until today. I updated from version 1.4.7 to 1.4.7.1 and got this error message:
There has been a critical error on this website. Please check your site admin email inbox for instructions.

Asked my hosting support for help and they found this error and then disabled the plugin:
Fatal error: Uncaught TypeError: fwrite(): Argument #1 ($stream) must be of type resource, bool given in /home/sistersu/public_html/wp-content/plugins/duplicator/classes/utilities/class.u.php:644 Stack trace: #0 /home/sistersu/public_html/wp-content/plugins/duplicator/classes/utilities/class.u.php(644): fwrite() #1 /home/sistersu/public_html/wp-content/plugins/duplicator/classes/class.plugin.upgrade.php(65): DUP_Util::setupBackupDirHtaccess() #2 /home/sistersu/public_html/wp-content/plugins/duplicator/classes/class.plugin.upgrade.php(46): DUP_LITE_Plugin_Upgrade::secureLocalStorageDirectory() #3 /home/sistersu/public_html/wp-content/plugins/duplicator/classes/class.plugin.upgrade.php(19): DUP_LITE_Plugin_Upgrade::updateInstallation() #4 /home/sistersu/public_html/wp-content/plugins/duplicator/duplicator-main.php(80): DUP_LITE_Plugin_Upgrade::onActivationAction() #5 /home/sistersu/public_html/wp-includes/class-wp-hook.php(307): duplicator_update() #6 /home/sistersu/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters() #7 /home/sistersu/public_html/wp-includes/plugin.php(476): WP_Hook->do_action() #8 /home/sistersu/public_html/wp-settings.php(461): do_action() #9 /home/sistersu/public_html/wp-config.php(80): require_once('/home/sistersu/...') #10 /home/sistersu/public_html/wp-load.php(50): require_once('/home/sistersu/...') #11 /home/sistersu/public_html/wp-admin/admin.php(34): require_once('/home/sistersu/...') #12 /home/sistersu/public_html/wp-admin/index.php(10): require_once('/home/sistersu/...') #13 {main} thrown in /home/sistersu/public_html/wp-content/plugins/duplicator/classes/utilities/class.u.php on line 644

Not sure whether to wait until the next update and reinstall the plugin – any suggestions?

Best regards,
Alison

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