In an H&M transaction, the code RM1 possbily means that there was a problem with your card. In particular, it means that there may be a problem with authorizing or processing the payment you made with your card. The next step that should be taken is to call your bank for more help.
Also, the system may have flagged your account because you have tried to make several transactions in a row. When a system sees several repeated attempts in a short amount of time, it may see this as a possible security risk and temporarily limit the ability to make transactions.
The best thing to do in this case is to wait a few days and give things a chance to calm down. Most likely, the system will check your account's security again during this time. After the time limit, you can try to place the order again, and if the previous problem was related to the repeated attempts, the system may allow the transaction this time.
If you want to fix the RM1 error and make sure the transaction goes smoothly, you need to talk to your bank about it.
If you've got more insights to add, don't hesitate to let us know.
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