Thank you for reaching out.
If the issue occurs with the text box, it is mainly related to the text color.
Double-click on the text box to select the text in it. Then click on the option "Set or change properties for the selected text box" (icon Aa) in the comment toolbar. Check the color selected for the text there. If it is white, you may change it to a different color.
Check the screenshot below:
Let us know if you need any help.
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