Activating plugin creates fatal error

Hi there,

On my website I’ve installed the plugin, once I activated it, the back-end gave me a fatal error.

Upon reviewing the logs I came across this log:

Got error ‘PHP message: WordPress database error Illegal mix of collations (utf8mb4_unicode_ci,IMPLICIT) and (utf8mb4_unicode_520_ci,IMPLICIT) for operation ‘=’ for query \n\t\t\tINSERT IGNORE INTO wp_pronamic_pay_mollie_customer_users (\n\t\t\t\tcustomer_id,\n\t\t\t\tuser_id\n\t\t\t)\n\t\t\tSELECT\n\t\t\t\tmollie_customer.id AS mollie_customer_id,\n\t\t\t\twp_user.ID AS wp_user_id\n\t\t\tFROM\n\t\t\t\twp_pronamic_pay_mollie_customers AS mollie_customer\n\t\t\t\t\tINNER JOIN\n\t\t\t\twp_usermeta AS wp_user_meta\n\t\t\t\t\t\tON wp_user_meta.meta_value = mollie_customer.mollie_id\n\t\t\t\t\tINNER JOIN\n\t\t\t\twp_users AS wp_user\n\t\t\t\t\t\tON wp_user_meta.user_id = wp_user.ID\n\t\t\tWHERE\n\t\t\t\twp_user_meta.meta_key IN (\n\t\t\t\t\t’_pronamic_pay_mollie_customer_id’,\n\t\t\t\t\t’_pronamic_pay_mollie_customer_id_test’\n\t\t\t\t)\n\t\t\t\t\tAND\n\t\t\t\twp_user_meta.meta_value != ”\n\t\t\t;\n\t\t

Is there any way I can solve this fatal error?

Any help is very much appreciated!

Cheers