When you are completing survey make sure you wait for each page to load completely, it will take few minutes to complete depending on how many pages the survey have, it usually have few pages that require some basic information.
The easiest offers are mobile PIN submits, all you need to do is send specific code to a number and it will be completed instantly.
In this case you need to try again carefully completing survey. We recommend changing browser and resetting modem. WARNING: Don't use adblock or else the survey can't verify you for completion.
This is very rare but can happen in some situations, when it happens make sure you try again after few minutes and make sure you read tips above, that will help you complete survey without any errors.