Hi. I had the same issue today. I had uninstalled gcash for a while thinking I won't use it again but a payment transfer came so I had to reinstall it. I also got the same error message and I've been looking for an answer online but then I solved it by simply re-linking my paypal account to my gcash account and after doing that I was able to transfer funds. Here's the step-by-step process: Go to your My linked accounts. Select Paypal and just press link. You'll get a pop-up message about un-linking your old paypal account but unless you are using a new paypal account you can ignore this and just click Yes. You'll be redirected to a paypal page that says Link your account with paypal. You'll be prompted to type your email and password. Click Authorize when you're done. After doing all these steps, you'll get a message saying Paypal account linking complete. You can then try to cash-in from your paypal account.
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