Error:
Error downloading https://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading https://downloads.arduino.cc/packages/package_index.json
 at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed1ドル(ContributionManagerUI.java:150)
 at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.Exception: Error downloading https://downloads.arduino.cc/packages/package_index.json
 at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:139)
 at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:333)
 at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:307)
 at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:285)
 at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed1ドル(ContributionManagerUI.java:146)
 ... 1 more
Caused by: java.nio.file.FileSystemException: C:\Users\Patil\AppData\Local\Arduino15\package_index.json.tmp: The process cannot access the file because it is being used by another process.
 at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
 at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
 at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
 at sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:269)
 at sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:103)
 at java.nio.file.Files.delete(Files.java:1126)
 at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:156)
 at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:132)
 at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:137)
 ... 5 more
Error downloading https://downloads.arduino.cc/packages/package_index.json
java.lang.RuntimeException: java.lang.Exception: Error downloading https://downloads.arduino.cc/packages/package_index.json
 at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed1ドル(ContributionManagerUI.java:150)
 at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.Exception: Error downloading https://downloads.arduino.cc/packages/package_index.json
 at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:139)
 at cc.arduino.contributions.packages.ContributionInstaller.download(ContributionInstaller.java:333)
 at cc.arduino.contributions.packages.ContributionInstaller.downloadIndexAndSignature(ContributionInstaller.java:307)
 at cc.arduino.contributions.packages.ContributionInstaller.updateIndex(ContributionInstaller.java:285)
 at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onUpdatePressed1ドル(ContributionManagerUI.java:146)
 ... 1 more
Caused by: java.nio.file.FileSystemException: C:\Users\Patil\AppData\Local\Arduino15\package_index.json.tmp: The process cannot access the file because it is being used by another process.
 at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:86)
 at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97)
 at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102)
 at sun.nio.fs.WindowsFileSystemProvider.implDelete(WindowsFileSystemProvider.java:269)
 at sun.nio.fs.AbstractFileSystemProvider.delete(AbstractFileSystemProvider.java:103)
 at java.nio.file.Files.delete(Files.java:1126)
 at cc.arduino.utils.network.FileDownloader.downloadFile(FileDownloader.java:156)
 at cc.arduino.utils.network.FileDownloader.download(FileDownloader.java:132)
 at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:137)
 ... 5 more