PiCar-X TTS Not Working

Bought one a year ago and the Text to speech works well, but the other three I bought and set-up for students will not run the ESpeak program, so we cannot hear the text. It comes up as picowave on the print of the text when we run the code.

1、Do you use Python control or APP control?
2、The product you bought a year ago, have you updated the library in time by now?
If you are using APP control:
Please update the APP version, and the ezblock OS mirror version, (the latest version is 1.2.2)
Mirror link: EzblockStudio/download
If using Python control:
Please pull the code again:
cd ~/picar-x
git pull
sudo python3 setup.py install

cd ~/vilib
git pull
sudo python3 install.py

cd ~/robot-hat
git pull
sudo python3 setup.py install

cd /home/pi/picar-x
sudo bash i2samp.sh
and reboot the Raspberry Pi.