Home › Troubleshooting

Troubleshooting

Solutions to common problems

Person looking at computer screens while troubleshooting problems
Login Issues Data & Sync Book Management Notes & Quotes Performance Account Clear Cache

Login Issues

Cannot Log In

Unable to log in even with correct email and password.

Solutions:
  • Double-check your email and password for typos
  • Verify correct capitalization and spacing
  • Try logging in with a different browser
  • If you forgot your password, use the password reset option
Private or incognito mode may prevent cookies from saving properly. Try normal browsing mode.

Cannot Connect to Google Drive

Google Drive authentication fails or doesn't show authentication screen.

Solutions:
  • Check if popup blocker is enabled and disable it for this site
  • Allow popups for this website in your browser
  • Enable third-party cookies (required for OAuth)
  • Log out of Google account and try again
  • Try a different browser (Chrome, Edge, Firefox, etc.)
Some browser extensions may block authentication. Try disabling them temporarily.

Forgot Password

You don't remember your password and cannot log in.

Solutions:
  • Visit the password reset page
  • Enter your registered email address
  • Click "Send Reset Link"
  • Check your email for the reset link and set a new password
Check your spam folder if you don't receive the reset email.

Data & Sync

Share Data Between Devices

Want to access data created on PC from your smartphone or tablet.

Solutions:
  • Connect to Google Drive through Settings
  • Save your data to Google Drive on the current device
  • Connect the same Google account on other devices
  • Load the saved file from Google Drive on the new device

Data Disappeared

Books or notes you added are no longer visible or have been deleted.

Solutions:
  • Use the search function to find the missing item
  • Click [File] → [Settings] from the menu, select the Display tab, and check filter settings
Data is stored in your browser. Regular Google Drive backups are recommended.

Book Management

Cannot Add Books

Error message appears or book doesn't get added.

Solutions:
  • Check you haven't reached the limit (20 books on free plan)
  • Verify all required fields are filled in
  • Try with a different browser

Cannot Edit Book Info

Changes to book title, author, or other information don't save.

Solutions:
  • Make sure to click the Save button after editing
  • Check your internet connection
  • Try a different browser

Cannot Delete Books

Getting an error or book won't delete.

Solutions:
  • Confirm the deletion in the confirmation dialog
  • Try a different browser

Notes & Quotes

Notes Won't Save

Your notes don't save or disappear after you write them.

Solutions:
  • Click the Save button after writing notes
  • Check your internet connection
  • Verify note length is within limits

Formulas Not Displaying

LaTeX formulas don't display correctly or show errors.

Solutions:
  • Math formulas are a premium feature - check your plan
  • Verify LaTeX syntax is correct (e.g., $E=mc^2$)
  • Check opening and closing delimiters match

Performance

Blank White Page

Page shows nothing but a blank white screen.

Solutions:
  • Check if JavaScript is enabled in your browser
  • Update your browser to the latest version
  • Try a different browser

Slow or Sluggish Performance

Page loads or responds slowly.

Solutions:
  • Close unnecessary browser tabs
  • Restart your browser
  • Disable unnecessary browser extensions
  • Check your internet connection speed

Mobile Layout Issues

Page doesn't display correctly on smartphone or tablet.

Solutions:
  • Update your browser to the latest version
  • Try rotating your device between portrait and landscape
  • Try a different mobile browser

Account

Change Email Address

Want to change your registered email address.

Solutions:
  • Log in and go to Account Settings
  • Find the "Change Email" section
  • Enter your new email address
  • Confirm via the verification email sent to your new address

Delete Account

Want to permanently delete your account.

See the Account Deletion Guide for detailed instructions.

Export Data

Want to export your books and notes as a backup.

Solutions:
  • Verify you have a premium plan (export is premium-only)
  • Log in and go to Account Settings
  • Choose your export format (TXT, Excel, CSV, Markdown, HTML, BibTeX)
  • Click Export and download your file

Change or Cancel Plan

Want to switch from premium to free plan or cancel.

Solutions:
  • Log in and go to Account Settings
  • Find the "Plan Management" section
  • Click "Change Plan" or "Cancel"

Clear Cache & Cookies

What is Cache and Cookies?

Cache stores images and files to make pages load faster. Cookies store login information and settings. Clearing them can fix many problems.

Google Chrome

Works on both desktop and mobile.

Desktop Steps:
  • Click the menu (⋮) in the top right
  • Go to "More Tools" → "Clear Browsing Data"
  • Set Time Range to "All time"
  • Check "Cookies and other site data" and "Cached images and files"
  • Click "Clear data"

Microsoft Edge

Clear from browser settings.

Mozilla Firefox

Clear from Privacy & Security settings.

Safari (Mac/iPhone/iPad)

Clear from Settings or System Preferences.

Still Need Help?

If the above solutions don't work, please contact our support team.

Contact Support