Answer: Assuming that there are no typos in the tags, the most likely problem is a rich text template with some hidden html code in the tag. The solution is to delete the tag and re-type it. If you want to format the content of the tag, make sure that you select the entire tag, including the curly brackets.
Answer: The dialog box shows sections based on the tags you have put in the Google Sheet™. The Email section is shown if there is a 'to' tag. The Doc section is shown if there is both a 'doc url' tag and a 'pdf name' tag. The Label section is shown if there is a 'label' tag. These are the mandatory tags for the different sections.
Answer: Mergery does not impose any limits, BUT Google Sheets™ will only allow a script to run for 30 minutes. Some actions are fairly quick (e.g. merging into a Gmail™ draft takes less than one second), but other actions are fairly slow (e.g merging into a Google Doc™ takes about 5 seconds). If you have a lot of data to process it may be necessary to use a 'select' tag and process the rows in batches.
If you need to merge thousands of rows of data, this is probably not the tool for you.
It should also be noted that Gmail™ imposes a limit of 1500 email recipients per day for Google Workspace™ accounts, and 100 email recipients per day for Consumer (e.g., gmail.com) and G Suite free editions. See Quotas for Google Services for more information.
Google Workspace™ is a trademark of Google LLC
Answer: Mergery does not impose any limits, BUT Gmail™ imposes a limit of 1500 email recipients per day for Google Workspace™ accounts, and 100 email recipients per day for Consumer (e.g., gmail.com) and G Suite free editions. See Quotas for Google Services for more information.
Google Workspace™ is a trademark of Google LLC
Answer: The most likely cause is that you have a lot of draft emails, and the draft you want is not in the most recent 100. The solution is to make a minor edit to your draft - that will make it the most recent draft.