FIle name too long – Cant send to Dropbox

I have BackWPUp on several websites. In the last couple of weeks I’m getting multiple error messages. Here’s my second website (experience.today). I cant send 3 different jobs from this site to Dropbox. Here’s one of the files.

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[INFO] BackWPup 3.6.9; A project of Inpsyde GmbH
[INFO] WordPress 5.2.2 on https://experiencebetter.today/
[INFO] Log Level: Normal
[INFO] BackWPup job: Experience Better – File Backup
[INFO] Logfile is: backwpup_log_3d6f20_2019-07-03_14-09-02.html
[INFO] Backup file is: ExperienceBetter.today_File_Backup_2019-07-03_14-09-02_ZQJH4LFT03.tar.gz
[03-Jul-2019 14:09:02] 1. Trying to make a list of folders to back up …
[03-Jul-2019 14:09:02] Added “wp-config.php” to backup file list
[03-Jul-2019 14:09:02] Added “.htaccess” to backup file list
[03-Jul-2019 14:09:02] 1341 folders to backup.
[03-Jul-2019 14:09:02] 1. Trying to generate a manifest file …
[03-Jul-2019 14:09:02] Added manifest.json file with 3.68 KB to backup file list.
[03-Jul-2019 14:09:02] 1. Trying to create backup archive …
[03-Jul-2019 14:09:02] Compressing files as TarGz. Please be patient, this may take a moment.
[03-Jul-2019 14:09:03] WARNING: File name “experiencebetter.today/wp-content/out-of-the-box-cache/request_15204a742d4156675c2054cda9850e39_17b6ce819faa348e6c4eb1b267b7b5ae_1322a95478c9e7c9400457c0a5164c80.cache” is too long to be saved correctly in TarGz archive!
[03-Jul-2019 14:09:03] WARNING: File name “experiencebetter.today/wp-content/out-of-the-box-cache/request_669b8bf746f39648822af8689827c71c_a4fb036f738bf4c2d5e453dc791c0d4d_1322a95478c9e7c9400457c0a5164c80.cache” is too long to be saved correctly in TarGz archive!
[03-Jul-2019 14:09:03] WARNING: File name “experiencebetter.today/wp-content/out-of-the-box-cache/request_15204a742d4156675c2054cda9850e39_aeda59055178c02810f9085f4e057b52_1322a95478c9e7c9400457c0a5164c80.cache” is too long to be saved correctly in TarGz archive!
[03-Jul-2019 14:09:03] WARNING: File name “experiencebetter.today/wp-content/out-of-the-box-cache/request_15204a742d4156675c2054cda9850e39_51c955dce51e592b4699027de22e4cf0_1322a95478c9e7c9400457c0a5164c80.cache” is too long to be saved correctly in TarGz archive!

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