Trying to Save Customer Account Causes 500 Error

[pmtrade]

Whenever I try to save a particular customer account the screen changes to the following:

This page isn’t working www.mywebsite.com is currently unable to handle this request. HTTP ERROR 500

The developer tools shows the following error:

POST https://www.mywebsite.com/loginforadmin/customer/index/save/key/d30e331d956b64705194dec98ee5fb818d43ce247c0a8ad563d7184dc1fe846d/back/edit 500
submit @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/mage/utils/misc.js:149
_save @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/client.js:128
(anonymous) @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:3417
fire @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:3238
fireWith @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:3368
deferred.<computed> @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:3467
success @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/client.js:46
fire @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:3238
fireWith @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:3368
done @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:9846
callback @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:10317
XMLHttpRequest.send (async)
send @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:10260
ajax @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:9744
beforeSave @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/client.js:35
save @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/client.js:94
save @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/provider.js:62
submit @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/form.js:313
save @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/Magento_Ui/js/form/form.js:265
dispatch @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:5232
elemData.handle @ /pub/static/version1589884676/adminhtml/Magento/backend/en_US/jquery.js:4884

/pub/static/version1589884676/adminhtml/Magento/backend/en_US/mage/utils/misc.js:149

This only seems to be happening on a single customer account, all others seem to be fine.

Does anyone know what might be causing this error and how I can resolve it?

Thanks

[Manish Mittal]

Hello @pmtrade 

Please check customer information when you trying to edit customer information is there any ' exists in name or in any other data it might through 500 error. or you can debug here : 

loginforadmin/customer/index

 Suggesting this solution as this is related to specific customers not for all.

[pmtrade]

Hi. Thanks for replying. There are no symbols in the fields and strangely, the customer account has no problems in the development site.

Thanks

[pmtrade · Accepted solution]

This issue now seems to have resolved itself, not sure if this was a server error or if running SSL commands somehow fixed it but either way the customer account is saving properly now.